Automobile tire-pump.



E. S. RYONE.

AUTOMOBILE TIRE PUMP.

APPLICATION FILED smmzs, 1912.

Patented Aug. 26, 1913.

s'ra "camera 'lQ.

EUGENE S. RYONE, F BRISTOL, RHODE ISLAND, ASSIGNOR, BY TEESNEASSIGNMENTS, TO CHARLES A. CARTIER, OF PROVIDENCE, RHODE ISLAND.

AUTOMOBILE TIRE-PUMP.

Specification of Letters Patent. Patten [Jed Aug.26, 19 13.

Application filed September 23, 1912. Serial No. 721,741.

gine-shaft thereof, to inflate the tires ofthe vehicle.

The invention consists, primarily, of two synchronously-drivenreciprocating pistons, an inlet valve to admit an air suctlon betweenthe pistons during their separating movement, and a back pressure valveto deliver the charge to the tire at time'of ingoing movement of thepistons.

The invention consists of the special details of construction andcombination of parts, as hereinafter described and claimed.

In the accompanying sheet of drawings, Figure 1 represents a centrallongitudinal section of my improved air pump, showing position of thepistons at end of suction stroke. Fig. 2 is a similar section, showingthe pistons at end of compression stroke, as after bharge has beenforced to inflate the tire. Fig. 3 is a cross-section of the pump, takenon line 00-41: of Fig. 2.

Referring to the drawings, in which like reference characters indicatelike parts, adesignates a horizontally-arranged open-ended cylinderhaving a base portion -a to receive bolts b, 5- for securing saidcylinder permanently upon the engine-bed of the automobile. The cylinder4 a-- has a straight bore therethrough to receive two substantiallyalike pistons -c and d-, which are each provided with a spiral grooveformed in its peripheral surface and both grooves arranged in a reverse4 order to one another, as at 0 c On a reduced projecting portion ofeach cylinder-bolt -b is mounted a roller e-, to fit within the groove-c of each piston. A head piece .f is secured by 50 threaded engagementat one end of the cylinder a;-, and is provided with a 0urnal bearingtherethrough to receive a rotary shaft g-, which is concentric to thebore of said cylinder. The shaft -g projects 55 within the cylinder -a.and a sleeve sprocket wheel h which is chain connection -77 with asprocket wheel ,with a beveled valve-seat, as k, k

g secured on said shaft, has a sliding fit in a bore 'd?- formedconcentric ranged diamet-rically opposite; each other,

to fit within slotted openings,-g formed in the: sleeve member g-"g+fofthe shaft g. On the shaft '-gis made fast a driven by a (not shoWn,)fast on the engine-shaft. The shaft gin revolving imparts areciprocating motion to the pistons, by means of the fixed rollers -e, emoving in the spiral formations of the latter, and the pistons arecaused to slide on the flanges d-- and meet together at each halfrevolution of said shaft, in the position of parts shown in Fig. 2.

At the upper part of the cylinder -w is secured a valve-case j, whichhas two horizontally-arranged bores provided each located at either sideof an opening ---j communicating within the cylinder and at a pointcentrallybetween the pistons. A11 inlet disk valve -Z- is provided toclose against the seat 7, and said valve has a centrally-projecting stemat each side thereof, as Z V, which respectively move in an inlet jformed through the case 7', and through the bored hub of a back pressuredisk valve m-, which is provided to close against the seat 7c A collar Whas threaded engagement to close one end of the valve-case y', and saidcollar is provided with two concentric bores n, n the former bore tocenter the hub of valve m, and the latter bore to form an outlet fordischarge of pressure from the pump; a flexible tube -obeing employed toconvey the pressure to point of inflation of the tire on the vehicle.The outer stem of valve Z, and hub of valve m, have each a flat side, asat points Z 7223-, in order to provide sufficient passage for intake anddischarge of air to and from the pump. As the pistons start on theiroutward stroke (Fig. 2,) av suction takes place at the inlet j therebyforcing the valve --Z from its seat to a point partially closing theopening j from whence the atmosphere passes and fills the chamber p leftby the separating movement of the pistons. After the pistons performsuction stroke the latter causes the valve -l to instantly close againstits seat, and the incoming pistons t en cause the pressure to open valvem and force the charge to the tire. I

By this description it is seen I provide a simple, relatively light, andefiicient tire pump. The parts are easily assembled and free fromliability to derangement, and the valves require no springs to assist intheir operation.

Having described my improvements, what I claim and desire to secure byLetters Patent, is

A tire pump such as described, comprising in combination an air cylinderprovided with an intake opening, tubular pistons within said cylinder ateach side of the nor/ eas opening and each piston provided with a ofsaid pistons to permit a working movement of the latter, means fordelivering air and preventing return charge of same to said cylinder,means to respectively cause the istons to separate from each other inmakmga suction charge and to make compression upon the inclosingmovement of said pistons.

In testimony whereof I aflix my signature in presence 0 two .witnesses.

EUGENE S. RYONE. Witnesses 1C. '1. HANNIGAN, PETER G. CANNON.

